Erratum about logbook entry #66257 (https://logbook.virgo-gw.eu/virgo/?r=66257): the explained axis convention was wrong. Here is the correct one:
-Axial Lateral, along the x-axis, corresponding to the laser beam (increasing when moving away from the central building)
-Vertical along the z-axis (positive upward)
-Lateral Axial, along the y-axis, with y = z ^ x
All setups have been checked for conformity with this convention.
All reported times are in UTC.

Work on NCAL in North End Building
13/05/2025
Unload box and start the installation of the new NCal setup around the NE Mirror:
~6:30 Stop all rotors and switch off power supply
-7:13 -9:00 drill hole for new East table
-9:05-10:00 start drilling holes for new West table
-11:10-12:00 finish drilling holes for new West table
- East table screwed on tower base at 18:00
-18:00 Support #2 fixed on East table (NE)
-18:13 zero setting of the NE support

In parallel
- Disassemble “old” NEN and NEF setups:

• Old NEN (rotor 11 in box5) dismounted. Box was difficult to open so that the covers of box 5 and the axis of rotor 11 need to be “repaired”
• Old NEF (rotor 3 in box 3) dismounted.
• All electronic removed (for use in new setup)
• Support removed.
• The table remains in place

-Rotor assembly:

• PVC rotor 16 mounted in box 01 (reusing the stator from rotor 11 box 5, NEN)
• PVC rotor 17 mounted in box 06 (reusing the stator from rotor 3 box 3, NEF)

Warning : a positioning reference hole of platform #3 are not correct. It must be reamed.

14/05/2025
We continued the NCal activities around the NE mirror:
- we fixed the West table on the floor on the morning
- we put the NW NCal support at it nominal position with reference spacers on the afternoon
- we update the SNEB_dbox_rack configuration to set their reference positions to 0:

• NE (morning) at gps 1431248200
• NW (afternoon) at gps 1431278200

- we put the NEN and NWN NCals in place:

• NEN (morning): box 01 and rotor 16
• NWN (afternoon): box 06 and rotor 17

Work on NCAL in West End Building
13/05/2025
Cf logbook entry https://logbook.virgo-gw.eu/virgo/?r=66763

14/05/2025

On WSN support, we installed counterweight and rotor 31 (box 11).
On WNN support, we installed counterweight and rotor 33 (box 2).
Electronic cabling done
Setup positions adjusted (see images)

Installation of all West end building rotors is complete. All have been runned between about 16:00 and 17:00 at around 18Hz.

For North End building (NEN and NWN), cabling and alignment must still be completed